OP
@gatekeep avatar
UTC

Molto Verboso
1974 Rally USA 200 1980 P200e
Joined: UTC
Posts: 1809
Location: Pioneer Valley Ma.
 
Molto Verboso
@gatekeep avatar
1974 Rally USA 200 1980 P200e
Joined: UTC
Posts: 1809
Location: Pioneer Valley Ma.
UTC quote
Hi does anyone have the secret for fitting/reinstalling the air bellows ?
@v_oodoo avatar
UTC

Style Maven
'74 50s x3 '87 PK125XL '92 PK50XLS Plurimatic - & - '58 AllState '68 Sprint '66(?) Super125 and '72 DanMotor Super150
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Posts: 9627
Location: seattle/athens
 
Style Maven
@v_oodoo avatar
'74 50s x3 '87 PK125XL '92 PK50XLS Plurimatic - & - '58 AllState '68 Sprint '66(?) Super125 and '72 DanMotor Super150
Joined: UTC
Posts: 9627
Location: seattle/athens
UTC quote
Yes,

External inline image provided by member with no explanatory text

I find these invaluable, especially #3, Captain Hook.
@qascooter avatar
UTC

Ossessionato
79 P200E (Ruby), 62 Allstate (B-62)
Joined: UTC
Posts: 4297
Location: Florence, OR
 
Ossessionato
@qascooter avatar
79 P200E (Ruby), 62 Allstate (B-62)
Joined: UTC
Posts: 4297
Location: Florence, OR
UTC quote
I just documented this for lucky bear...

https://modernvespa.com/forum/post2605967#2605967
@autojack avatar
UTC

Addicted
'76 Vespa Rally 200
Joined: UTC
Posts: 703
Location: Melbourne
 
Addicted
@autojack avatar
'76 Vespa Rally 200
Joined: UTC
Posts: 703
Location: Melbourne
UTC quote
Yeah you need some kind of tool you can hook under it. I've used a bent piece of spring steel before. Now I have pick tools like someone showed above. It also helps to warm it with a hair dryer or heat gun or just leave it out in the sun. Softens the rubber. I've also sometimes found it easier to put it on the frame first, working from inside the bellows, and then hook it over the carb.
UTC

parallelogramerist
Joined: UTC
Posts: 5258
 
parallelogramerist
Joined: UTC
Posts: 5258
UTC quote
a quick shot of silicon spray will help a bunch.

*EDIT: i just looked at QaScooter's quick tutorial (great pics Scott) and i do it the exact same way as well.
⚠️ Last edited by whodatschrome on UTC; edited 1 time
@fatbear5 avatar
UTC

Molto Verboso
1977 P200, 1980 P200
Joined: UTC
Posts: 1250
Location: Fresno, CA
 
Molto Verboso
@fatbear5 avatar
1977 P200, 1980 P200
Joined: UTC
Posts: 1250
Location: Fresno, CA
UTC quote
qascooter wrote:
I just documented this for lucky bear...

https://modernvespa.com/forum/post2605967#2605967
Yes, listen to gascooter. It was his advice that made it work for me.

Lucky bear
⚠️ Last edited by Fatbear5 on UTC; edited 1 time
@oopsclunkthud avatar
UTC

Banned
3:5
Joined: UTC
Posts: 8995
Location: San Francisco
 
Banned
@oopsclunkthud avatar
3:5
Joined: UTC
Posts: 8995
Location: San Francisco
UTC quote
qascooter wrote:
I just documented this for lucky bear...

https://modernvespa.com/forum/post2605967#2605967
I use the same method, no other tools
@autojack avatar
UTC

Addicted
'76 Vespa Rally 200
Joined: UTC
Posts: 703
Location: Melbourne
 
Addicted
@autojack avatar
'76 Vespa Rally 200
Joined: UTC
Posts: 703
Location: Melbourne
UTC quote
Just occurred to me to ask: what is the point of the bellows and connecting the carb air intake to the chamber under the seat? The only thing I can think of is getting cooler air from being a little further from the motor, but I'm doubtful that's it.
@christopher_55934 avatar
UTC

Ossessionato
2007 Stella 225
Joined: UTC
Posts: 3547
Location: Rochester, Minnesota
 
Ossessionato
@christopher_55934 avatar
2007 Stella 225
Joined: UTC
Posts: 3547
Location: Rochester, Minnesota
UTC quote
autojack wrote:
Just occurred to me to ask: what is the point of the bellows and connecting the carb air intake to the chamber under the seat? The only thing I can think of is getting cooler air from being a little further from the motor, but I'm doubtful that's it.
I did it so It would be harder to pickup any large chunks of dirt or road debris.
UTC

Hooked
px 125 disc
Joined: UTC
Posts: 314
Location: Essex, GB
 
Hooked
px 125 disc
Joined: UTC
Posts: 314
Location: Essex, GB
UTC quote
autojack wrote:
Just occurred to me to ask: what is the point of the bellows and connecting the carb air intake to the chamber under the seat? The only thing I can think of is getting cooler air from being a little further from the motor, but I'm doubtful that's it.
The idea seems to be that a) its cool air rather than hot air from around the engine ( cool air good ,hot air bad and b), it acts as a primary filter, a settlement chamber if you like. This idea is used a lot elsewhere, for example the filter on my fish pond has one and the muck that settle there you wouldnt believe.
UTC

parallelogramerist
Joined: UTC
Posts: 5258
 
parallelogramerist
Joined: UTC
Posts: 5258
UTC quote
autojack wrote:
Just occurred to me to ask: what is the point of the bellows and connecting the carb air intake to the chamber under the seat? The only thing I can think of is getting cooler air from being a little further from the motor, but I'm doubtful that's it.
Ride 100 meters down a dusty gravel road with no air bellows and you will be absolutely amazed just how dirty your air filter will be.
@autojack avatar
UTC

Addicted
'76 Vespa Rally 200
Joined: UTC
Posts: 703
Location: Melbourne
 
Addicted
@autojack avatar
'76 Vespa Rally 200
Joined: UTC
Posts: 703
Location: Melbourne
UTC quote
It makes sense I guess, I'm just surprised that taking the air from under the seat provides that much more filtration of particles. But maybe the occasional methane emission boosts performance a bit...
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